Cherevko K, Zhyshkovych M, Kalyn R, Komarevych I. Master class as a leading pedagogical technology in professional improvement of individual performing qualities of singers. AmazInv [Internet]. 2021 Dec. 17 [cited 2026 Aug. 6];10(47):282-9. Available from: https://mail.amazoniainvestiga.info/index.php/amazonia/article/view/1829